<html>

<head>
    <title>Socket Test</title>
    <script src="https://cdn.socket.io/4.7.1/socket.io.min.js"></script>
    <script>
        var io = io("http://localhost:8085");
        io.on("connect", function() {
            console.log("connected");
        });
        io.on("test", function(data) {
            console.log(data);
        })
    </script>
</head>
<body>
<button onclick="io.emit('test', 'test-from-client')">Send</button>
</body>
</html>